HIGHER CRUSTACEA OF THE FIRTH OF CLYDE. 331 



Abundant everywhere between tidemarks, and 

 occasionally dredged in shallow water. Specimens 

 taken in the sheltered waters of the Gareloch and 

 Loch Goil were unusually infested with SaccuUnae. 



Genus Portumnus, Leach. 



PORTUMNUS LATIPES. 



Cancer latipes, Penii., Brit. Zool. iv.. p. 5, pi. i., fig. 1. 



Portumnus variegatus, Leacli, Ediii. Ency. vii., p. 391. — Bell, 

 Brit. Crust, p. 85. 



Platyonychus latipes, M. Edw., Hist. Nat. des Crust, i., p. 436. 



Portumnus latipes, White, List Crust. Brit. Mus. p. 23 ; Pop. 

 Hist. Brit. Crust, p. 13. 



Washed ashore on Irvine Sands (Robertson). 



Subtribe CORYSTOIDEA. 



Famihj CORYSTIDAE. 



Genus Atelecyclus, Leach. 



ATELECYCLUS SEPTEMDENTATUS. 



Cancer (Hippa) septemdentatus, Montague, Trans. Linn. Soc. 

 xi., pi. 1., fig. 1. 



Atelecyclus septemdentatus. Leach, Edin. Ency. vii., p. 430 ; 

 Trans. Linn. Soc. xi., p. 313. 



Atelecyclus heterodon, Leach, Malac. Brit. pi. ii. — Bell, Brit. 

 Crust, p. 153. 



A single specimen from the Alland Bank, Millport 

 Bay (Robertson). 



Genus Corystes, Latr. 



CORYSTES CASSIVELAUNUS. 



Cancer cassivelaunus, Penn., Brit. Zool. iv. pi. vii., fig. 13. 



Corystes dentatus, Latr., Hist. Nat. des Crust, vi., p. 122. — 

 Couch, Cornish Fauna, p. 74. 



Corystes cassivelaunus. Leach, Edin. Ency. vii., p. 395.— Bell, 

 Brit. Crust, p. 159. 



Kaimes Bay, Cumbrae, in sand below low-water 

 mark, and washed ashore after storms. The habits 

 of this species, especially as regards its mode of 

 burrowing in sand, have been carefully studied by 

 Mr. Robertson, and form the subject of a com- 

 munication by him to the Natural History Society 

 of Glasgow. 



